Marine jack plate



FIG. 1 is a top plan view of the marine jack plate of my invention;

FIG. 2 is a front end view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right end view thereof;

FIG. 5 is a perspective view thereof showing the jack plate attached to a boat shown in phantom lines; and,

FIG. 6 is a rear end view thereof. 

The ornamental design for a marine jack plate, as shown and described. 